Cement-finishing tool.



M. DERVOZ.

CEMENT FINISHING TOOL.

APPLICATION FILED APR. 22, 1912.

1,064,133. Patented June 10, 1913.

Mano heaven, or nosnnennns, CALIII'DBNIA.

CEMENT-FINISHING TWOL.

Specification of Letters Patent Patented Junelt), 1913.

Application filed April 22, iota. Serial iraeeasae.

ject of the Emperor of Austria-Hungary,

plate residing at LosAn-geles, in the count of Los Angeles and State of California, ave invented a new and useful (lementl inishing Tool, of which the following is a speci fication. j

An object-of this invention is to provide means whereby a cement worker may mark plastic cement surfaces with ornamental designs including circles, semi-circles and various arcs connectedby right lines and rec tangul'ar figures.

An object of this invention is to produce a tool of this character which can be easily operated and which will produce smooth and accurate work.

An object is to provide a cement marker that will enable the werkman to accurately join parallel lines atthe'corners of the figures that constitute the ornamental designs.

Other objects and advantages may appear from the subjoined detail description.

. The accompanying drawings illustrate the invention.

Figure 1 is a perspective view of a cement marker constructed in accordance with this invention. Fig. 2 is an elevation of the appliance shown in Fig. 1, "the view being taken in line with the'tool carrier and the supporting axis. Fig. 3 is an inverted plan of Fi 2, the alining marks on the footing indicated in dotted lines. Fig. 4 is a fragmental sectional detall on an enlarged scale of the resilient support means for the'markin tool. Fig. 5 is a fragmental detail of one o the split "ournals in place on the axis. Fig. 6 is a re uced plan-showing the cement marker on a cement pavement which is partly finished. Fi 7 1s a perspective View of an edge mar ing tool constructed in accordance with the principle of this invention relative to joining the lines at the corners. Fig. 8 is a plan ofthe working face of the tool shown in Fig. 7. Fig. 9 is a view of the working face of the tool for marking the lines at the corners of the inside figures.

so The axis 1 is fixed at right an les to the end plate 2 having a supportin ace 3 that is flat and smooth and prefer ly polished and is adapted to restu on the plastic cement surface that is to e finished. Said to axis is provided with a handle 4 by which the operator'mayhold the axis and the plate in proper position on the plastic cement surface. a

A revoluble support 5 is journaled by split homes 6 in annular riphera'l coves 7 on the axis, the outsi es of saidoxes being provided with threaded tips 8 drawn toward each other by the wing nut .9. The outer endof thesupport .is provided with a box .10 having a vertical bore with upper and lower sleeve extensions 11, 12, the lower end-of said bore bein provided withonintornal shoulder 13.an witha oentralangular perforation 14 through which the lower angular section 16 of thetool-carrying rod 16 is nonwrotatably mountedto move in parallelism with the axis 1 at right angles to the'produced plane of the supporting face 3.

The tool-carrying rod 16 is provided with a cylindrical shoulder 1-7 adapted to fit the bore of the sleeve .11 and to shde in and out therein and a helical spring 18 is seated on the shoulder 13 and encircles the intermediate body 19 of the tool-oarrying rod inside said bore. The lower and upper ends of said spring'engage the shoulders 13 and 17 respectively, :thus forming a resilient support for the tool-sup orting rod 16 which is provided with a ban le 20 fixed to the outer side of said rod.

The are marking tool .21 is pivoted by a pin as the bolt 22 to the foot of the .tool carrying rod 16, the axis of said bolt 22 beradial to thecentra'l axis 1 and in par al elism with the plane of the supporting surface 3. Tilting rods 23 are pivoted by pins 24 to the opposite ends of the marking tool '21 and their upper portions slide through guides 25 fixed to the su porting rod 16. Said guides are, formed 'by the guide-bar 26. A =tilting lever 27 :is pivoted on the upper portion .28 of the marking tool supporting rodby a pin 29 parallel with the pin 22 and with the produced plane of-the supporting face, 8, and :is provided with finger-pieces 30 and 31 on opposite sides of the vertical plane in which c axis of the pins 22 and 2t) extend. .Helical springs 32 are interposed between the ides 25 and the ends of lever 27, to normal 1y hold thezlever level. Said spring encircles the tilting rods 28 which are engaged at their upper endsby *the opposite ends of the tilting lever that may alternately depress said rods as the lever is oscillated. The lever is thus 'is provided with a Ill) comprises semi-circular ridges on oppo-.-

connected with the tool 21 through the end of the main marking rib 36 will cut into He will then swing .the handle 20 around the axis'l thereby rods 23.

The marking plate 21 is constructed in the segment of a cylinder, and is provided with segmental ribs 33, 34, 35, the larger of which ribs 33 roove 36, so that said site sides of a groove.. The grooved rib 33 extends from edgeto edge of the marking plate 21; and the minor ribs 34 and'35 ter minate inside the border thereof, sothat when the marking tool plate is tilted and the end of the main marking rib cuts into the surface, the minor ribs 34, 35 will be above the surface to be marked.

On top of the foot-plate 2 are provided radial centering index ribs 37 38 spaced ninety degrees apart, being radial of the plate and extending to the rim of the plate, so that the workman may accurately center the plate over the center of the lace at which the ornamental design 39 .1s to be located. 1

When the springs 18 and 32 are free, they hold the marking plate 21 slightlyelevated above the level of the contact surface 3. of

.the supporting and centering plate 2, as

shown 1n Fig. 2.

The free hand marking tools shown in Figs. 7, 8 and 9 correspond to the marking tool 21 in that each comprises a plate having a main rib running from end to end of the plate and a short rib terminating between the ends of the late; that is to say, within the border of t e plate'so that when the tool is tipped to cause the end of the main rib to cut into the plastic cement surface,

, the minor rib or ribswill not-contact with surface of the cement; but when the tool is held more nearly level, said minor ribs, as well as-the main rib may be caused to mark the plastic surface.

In Figs. 7 and 8 the plate 40 is. provided with an ogee grooved rib or blade 41 at one edge extending from end to end of the plate and with a minor rib 42 between said. grooved rib and the other edge of the plate. 1 In Fi from en 'vided on' o po'site sides of said main rib between sai main rib and the opposite'edge of the plate. The plastic cement surface 46 may be marked with construction lines a intersecting each other at right angles at the center 1) around which it is desired to locate the ornament.- The workman will then place the end-platev 1 over said center I) with the to ribs or indicat0rs'37 and 38 thereof alined with the lines a; and then hewill grasp the handle 20 and by depressing one of the thumb pieces of the tilting lever he will depress one end of the marking plate face of the arc marking tool 9 the main central rib 43 extendsv to end of the plate 40at the midline thereof and minor ribs 44, 45 are pro:

21, so that by depressing the handle 20, one

the plastic surface.

causing the ends of the main marking rib 36 to mark a circular groove 0. The end of the marker serves to smooth the surface over which the marker passes,.so that when the tool has been swung around the circle the surface remains smooth excepting for the seam-like, circular, double groove 0'. The workman may then bring the marker plate 21 into position with its edge alined with one of the construction lins a; and then freeing the tilting lever sothat the springs 32 may act thereon to return the plate 21 to a horizontal posit-ion parallel with the produced plane of may again depress the handle 20, thus forcing the ribs'44, 44 into the plastic surface and thereupon will move the handle 20 until said edge of the blade 21 is alined with the next construction line a. During this movement the marking ribs 34, 35 will mark the surface with the arcs d and e which are spaced apart from the construction line a. In this way the spaces between the constructhe supporting plate, he

tion lines will all be marked. The workman may then remove the tool from the plastic surface an he may repeatthe operation.

as required. By means of the edging tool' A shown in Figs. 7 and 8, the workman may then mark the border line f. This is preferably done by tilting the-tool so as to bring the inner end of the main ogee blade or rib 41 into the plastic cement at the place desired, and at the same time bringing the blade 40 to a level, position to cause the rib 42 to-cut into the plastic surface; and by starting the blade at the line a and drawing it along at an angle thereto he will produce theborder line and the inner figure g' parallel therewith, the ends of said line being spaced apart from the construction line a. Then by taking the tool B shown in Fig. 9 parallel ornamentation lines 72., i. may be drawn; the tool B being heldaslant to mark the line halone, and being held level to mark both lines simultaneously, thus enabling the Workman to joint the straight lines to the curved lines to complete the ornamental design.

I claim v A 1. A cement marker comprising an axis; an end plate fixed on the axis at right angles thereto and having a supporting face; a handle on the axis; a revoluble support journaled on the axis; and a marker on the support; said marker being adapted toextend to the produced plane of sald supp orting face.

2.. A cement marker comprising an. axis;

an plate porting face transverse to the axis; a revoluble support journaled onthe axisr"-and a fixed on the axis having a sup marker mounted on the support and movable toward and from the produced plane of said supporting face.

3. A cement marker comprising an axis; an end plate fixed at right angles to the axis and having a supporting face; a revoluble support journaled on the axis; a marker on the support; and resilient means on said support to carry the marker.

4. A cement marker comprising an axis; aplate on the axis and provided withasupporting face transverse to said axis; a revoluble support on said axis; said support being provided with a box having a vertical bore, and the lower end of said bore being provided with an internal shoulder; a toolcarrying rod slidable in the bore and provided with a shoulder; a spring between the shoulder of the bore and the shoulder of the rod, to support the rod; a handle on the rod, and a tool at the lower end of the rod.

5. A cement marker comprising an axis; a plate on said axis provided with a supporting face transverse to said axis, a support revolubly mounted on the axis, a rod, a marking tool pivotally mounted on the rod, means to move the rod in parallelism with the axis and means to tilt the tool on the rod.

6. A cement marker comprising an axis, a supporting plate for the axis, a support journaled on the axis, a tool-carrying rod mounted on said support to move in parallelism with said axis, a marking tool pivoted to the tool-carrying rod, means to resiliently support the tool-carrying rod, connecting rods connected with the marking tool, a lever connected with said rods and adapted to depress said rods alternately, and resilient means to hold the lever and the marking tool normally parallel with the plane of the supporting plate.

7. A marking tool comprising an axis, a plate on the axis, a support mounted to revolve around the axis, a tool supporting rod in slidable relation to the support, a spring on the support to support the rod, a marking tool pivoted to the support, guides on said supporting rod, tilting rods pivoted to the marking tool and extending through the guides, a lever pivoted to the tool-suping rod and extending over the ends of the tilting rods and adapted to depress said rods alternately, and resilient means to nor mally act upon the lever and the tilting rods to hold the marking tool in normal position.

8. The combination with a support, of a tool-carrying rod slidable in said support, a spring for supporting said rod, uides fixed to the su port, a marking too ivot lly connecte to the rod and provided with a rib extending to the edge of said tool,

rods pivoted to the tool and extending through the guides, and means for alternately depressing said rods.

9. In a cement marker, an axis; a plate on the end of the axis; said plate being provided with radial index ribs spaced 9O apart; a support revoluble on said axis; and a tiltable marking tool connected with said support and provided with a convex face, a main marking rib extending on said face to the end of the marking tool and other marking ribs terminating short of the edge of said marking tool.

10. A cement marker provided with a tiltable blade having a smooth convex face, a main marking rib extending on said face to one edge thereof, and a marking rib terminating at a distance from such edge.

11. A cement marker provided with a tiltable blade having a smooth convex face; a main rib on said face extending from edge to edge of said face and a rib terminating short of said edges.

12. A cement marker comprising an axis; a transverse plate on the end of the axis; a marking tool having a marking face provided witha marking rib; an arm mounted to revolve on the axis and means yieldingly supporting the marking tool above the plane of the supporting face of the transverse plate and allowing said tool to be depressed to such plane.

13. A cement marker comprising a marking tool rod; an axis supporting the rod; a marking tool pivoted to the rod and provided with a smoothing face and with a rib on such face; a handle for the rod; guides on the rod; tilting rods pivoted to the tool and extending through the guides; a tilting lever pivoted to the rod and contacting with the ends of the rod; and spring means to normally hold the tool level.

14:. The combination with a rod; of an axis supporting the rod; a handle on the rod; a tool pivoted on the rod; a tilting lever on the rod, and means between the tilting lever and the tool to tilt the tool when the lever is moved.

15. The combination with a rod; of an axis supporting the rod; a handle on the rod; a tool pivoted on the rod; a tilting lever on the rod; means between the tilting lever and the tool to tilt the tool when the lever is moved; and resilient means to return the tool to normal position.

In testimony whereof, I have hereunto set my hand at Los Angeles, Califorma, this 15th day of April, 1912.

MEHO DERVOZ.

In presence of- J AMES R. TOWNSEND, L. BELLE RICE. 

